/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 * 02111-1307, USA.
 *
 * http://www.gnu.org/copyleft/gpl.html
 */
package com.l2jfrozen.crypt;

import com.l2jfrozen.Config;

/**
 * Encodes and decodes to and from Base64 notation. The source is based on the work of Robert Harder
 * <p>
 * I am placing this code in the Public Domain. Do with it as you will. This software comes with no guarantees or
 * warranties but with plenty of well-wishing instead! Please visit <a
 * href="http://iharder.net/xmlizable">http://iharder.net/base64</a> periodically to check for updates or to contribute
 * improvements.
 * </p>
 * 
 * @author Robert Harder
 * @author rob@iharder.net
 * @version 2.0
 */
public class Base64
{

	/* ********  P U B L I C   F I E L D S  ******** */

	/** No options specified. Value is zero. */
	public final static int NO_OPTIONS = 0;

	/** Specify encoding. */
	public final static int ENCODE = 1;

	/** Specify decoding. */
	public final static int DECODE = 0;

	/** Specify that data should be gzip-compressed. */
	public final static int GZIP = 2;

	/** Don't break lines when encoding (violates strict Base64 specification) */
	public final static int DONT_BREAK_LINES = 8;

	/* ********  P R I V A T E   F I E L D S  ******** */

	/** Maximum line length (76) of Base64 output. */
	private final static int MAX_LINE_LENGTH = 76;

	/** The equals sign (=) as a byte. */
	private final static byte EQUALS_SIGN = (byte) '=';

	/** The new line character (\n) as a byte. */
	private final static byte NEW_LINE = (byte) '\n';

	/** Preferred encoding. */
	private final static String PREFERRED_ENCODING = "UTF-8";

	/** The 64 valid Base64 values. */
	private final static byte[] ALPHABET;
	private final static byte[] _NATIVE_ALPHABET =
	/* May be something funny like EBCDIC */
	{
			(byte) 'A',
			(byte) 'B',
			(byte) 'C',
			(byte) 'D',
			(byte) 'E',
			(byte) 'F',
			(byte) 'G',
			(byte) 'H',
			(byte) 'I',
			(byte) 'J',
			(byte) 'K',
			(byte) 'L',
			(byte) 'M',
			(byte) 'N',
			(byte) 'O',
			(byte) 'P',
			(byte) 'Q',
			(byte) 'R',
			(byte) 'S',
			(byte) 'T',
			(byte) 'U',
			(byte) 'V',
			(byte) 'W',
			(byte) 'X',
			(byte) 'Y',
			(byte) 'Z',
			(byte) 'a',
			(byte) 'b',
			(byte) 'c',
			(byte) 'd',
			(byte) 'e',
			(byte) 'f',
			(byte) 'g',
			(byte) 'h',
			(byte) 'i',
			(byte) 'j',
			(byte) 'k',
			(byte) 'l',
			(byte) 'm',
			(byte) 'n',
			(byte) 'o',
			(byte) 'p',
			(byte) 'q',
			(byte) 'r',
			(byte) 's',
			(byte) 't',
			(byte) 'u',
			(byte) 'v',
			(byte) 'w',
			(byte) 'x',
			(byte) 'y',
			(byte) 'z',
			(byte) '0',
			(byte) '1',
			(byte) '2',
			(byte) '3',
			(byte) '4',
			(byte) '5',
			(byte) '6',
			(byte) '7',
			(byte) '8',
			(byte) '9',
			(byte) '+',
			(byte) '/'
	};

	/** Determine which ALPHABET to use. */
	static
	{
		byte[] __bytes;
		try
		{
			__bytes = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/".getBytes(PREFERRED_ENCODING);
		} // end try
		catch(java.io.UnsupportedEncodingException use)
		{
			__bytes = _NATIVE_ALPHABET; // Fall back to native encoding
		} // end catch
		ALPHABET = __bytes;
	} // end static

	/**
	 * Translates a Base64 value to either its 6-bit reconstruction value or a negative number indicating some other
	 * meaning.
	 **/
	final static byte[] DECODABET =
	{
			-9, -9, -9, -9, -9, -9, -9, -9, -9, // Decimal  0 -  8
			-5,
			-5, // Whitespace: Tab and Linefeed
			-9,
			-9, // Decimal 11 - 12
			-5, // Whitespace: Carriage Return
			-9,
			-9,
			-9,
			-9,
			-9,
			-9,
			-9,
			-9,
			-9,
			-9,
			-9,
			-9,
			-9, // Decimal 14 - 26
			-9,
			-9,
			-9,
			-9,
			-9, // Decimal 27 - 31
			-5, // Whitespace: Space
			-9,
			-9,
			-9,
			-9,
			-9,
			-9,
			-9,
			-9,
			-9,
			-9, // Decimal 33 - 42
			62, // Plus sign at decimal 43
			-9,
			-9,
			-9, // Decimal 44 - 46
			63, // Slash at decimal 47
			52,
			53,
			54,
			55,
			56,
			57,
			58,
			59,
			60,
			61, // Numbers zero through nine
			-9,
			-9,
			-9, // Decimal 58 - 60
			-1, // Equals sign at decimal 61
			-9,
			-9,
			-9, // Decimal 62 - 64
			0,
			1,
			2,
			3,
			4,
			5,
			6,
			7,
			8,
			9,
			10,
			11,
			12,
			13, // Letters 'A' through 'N'
			14,
			15,
			16,
			17,
			18,
			19,
			20,
			21,
			22,
			23,
			24,
			25, // Letters 'O' through 'Z'
			-9,
			-9,
			-9,
			-9,
			-9,
			-9, // Decimal 91 - 96
			26,
			27,
			28,
			29,
			30,
			31,
			32,
			33,
			34,
			35,
			36,
			37,
			38, // Letters 'a' through 'm'
			39,
			40,
			41,
			42,
			43,
			44,
			45,
			46,
			47,
			48,
			49,
			50,
			51, // Letters 'n' through 'z'
			-9,
			-9,
			-9,
			-9
	// Decimal 123 - 126
	/*,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,     // Decimal 127 - 139
	-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,     // Decimal 140 - 152
	-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,     // Decimal 153 - 165
	-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,     // Decimal 166 - 178
	-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,     // Decimal 179 - 191
	-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,     // Decimal 192 - 204
	-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,     // Decimal 205 - 217
	-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,     // Decimal 218 - 230
	-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,     // Decimal 231 - 243
	-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9         // Decimal 244 - 255 */
	};

	//private final static byte BAD_ENCODING    = -9; // Indicates error in encoding
	private final static byte WHITE_SPACE_ENC = -5; // Indicates white space in encoding
	private final static byte EQUALS_SIGN_ENC = -1; // Indicates equals sign in encoding

	/** Defeats instantiation. */
	private Base64()
	{}

	/* ********  E N C O D I N G   M E T H O D S  ******** */

	//    /**
	//     * Encodes the first three bytes of array <var>threeBytes</var>
	//     * and returns a four-byte array in Base64 notation.
	//     *
	//     * @param threeBytes the array to convert
	//     * @return four byte array in Base64 notation.
	//     * @since 1.3
	//     */
	//    private static byte[] encode3to4( byte[] threeBytes )
	//    {
	//        return encode3to4( threeBytes, 3 );
	//    }   // end encodeToBytes

	//    /**
	//     * Encodes up to the first three bytes of array <var>threeBytes</var>
	//     * and returns a four-byte array in Base64 notation.
	//     * The actual number of significant bytes in your array is
	//     * given by <var>numSigBytes</var>.
	//     * The array <var>threeBytes</var> needs only be as big as
	//     * <var>numSigBytes</var>.
	//     *
	//     * @param threeBytes the array to convert
	//     * @param numSigBytes the number of significant bytes in your array
	//     * @return four byte array in Base64 notation.
	//     * @since 1.3
	//     */
	//    private static byte[] encode3to4( byte[] threeBytes, int numSigBytes )
	//    {
	//        byte[] dest = new byte[4];
	//        encode3to4( threeBytes, 0, numSigBytes, dest, 0 );
	//        return dest;
	//    }
	/**
	 * Encodes up to the first three bytes of array <var>threeBytes</var> and returns a four-byte array in Base64
	 * notation. The actual number of significant bytes in your array is given by <var>numSigBytes</var>. The array
	 * <var>threeBytes</var> needs only be as big as <var>numSigBytes</var>. Code can reuse a byte array by passing a
	 * four-byte array as <var>b4</var>.
	 * 
	 * @param b4 A reusable byte array to reduce array instantiation
	 * @param threeBytes the array to convert
	 * @param numSigBytes the number of significant bytes in your array
	 * @return four byte array in Base64 notation.
	 * @since 1.5.1
	 */
	static byte[] encode3to4(byte[] b4, byte[] threeBytes, int numSigBytes)
	{
		encode3to4(threeBytes, 0, numSigBytes, b4, 0);
		return b4;
	} // end encode3to4

	/**
	 * Encodes up to three bytes of the array <var>source</var> and writes the resulting four Base64 bytes to
	 * <var>destination</var>. The source and destination arrays can be manipulated anywhere along their length by
	 * specifying <var>srcOffset</var> and <var>destOffset</var>. This method does not check to make sure your arrays
	 * are large enough to accomodate <var>srcOffset</var> + 3 for the <var>source</var> array or <var>destOffset</var>
	 * + 4 for the <var>destination</var> array. The actual number of significant bytes in your array is given by
	 * <var>numSigBytes</var>.
	 * 
	 * @param source the array to convert
	 * @param srcOffset the index where conversion begins
	 * @param numSigBytes the number of significant bytes in your array
	 * @param destination the array to hold the conversion
	 * @param destOffset the index where output will be put
	 * @return the <var>destination</var> array
	 * @since 1.3
	 */
	static byte[] encode3to4(byte[] source, int srcOffset, int numSigBytes, byte[] destination, int destOffset)
	{
		//           1         2         3
		// 01234567890123456789012345678901 Bit position
		// --------000000001111111122222222 Array position from threeBytes
		// --------|    ||    ||    ||    | Six bit groups to index ALPHABET
		//          >>18  >>12  >> 6  >> 0  Right shift necessary
		//                0x3f  0x3f  0x3f  Additional AND

		// Create buffer with zero-padding if there are only one or two
		// significant bytes passed in the array.
		// We have to shift left 24 in order to flush out the 1's that appear
		// when Java treats a value as negative that is cast from a byte to an int.
		int inBuff = (numSigBytes > 0 ? source[srcOffset] << 24 >>> 8 : 0) | (numSigBytes > 1 ? source[srcOffset + 1] << 24 >>> 16 : 0) | (numSigBytes > 2 ? source[srcOffset + 2] << 24 >>> 24 : 0);

		switch(numSigBytes)
		{
			case 3:
				destination[destOffset] = ALPHABET[(inBuff >>> 18)];
				destination[destOffset + 1] = ALPHABET[inBuff >>> 12 & 0x3f];
				destination[destOffset + 2] = ALPHABET[inBuff >>> 6 & 0x3f];
				destination[destOffset + 3] = ALPHABET[inBuff & 0x3f];
				return destination;

			case 2:
				destination[destOffset] = ALPHABET[(inBuff >>> 18)];
				destination[destOffset + 1] = ALPHABET[inBuff >>> 12 & 0x3f];
				destination[destOffset + 2] = ALPHABET[inBuff >>> 6 & 0x3f];
				destination[destOffset + 3] = EQUALS_SIGN;
				return destination;

			case 1:
				destination[destOffset] = ALPHABET[(inBuff >>> 18)];
				destination[destOffset + 1] = ALPHABET[inBuff >>> 12 & 0x3f];
				destination[destOffset + 2] = EQUALS_SIGN;
				destination[destOffset + 3] = EQUALS_SIGN;
				return destination;

			default:
				return destination;
		} // end switch
	} // end encode3to4

	/**
	 * Serializes an object and returns the Base64-encoded version of that serialized object. If the object cannot be
	 * serialized or there is another error, the method will return <tt>null</tt>. The object is not GZip-compressed
	 * before being encoded.
	 * 
	 * @param serializableObject The object to encode
	 * @return The Base64-encoded object
	 * @since 1.4
	 */
	public static String encodeObject(java.io.Serializable serializableObject)
	{
		return encodeObject(serializableObject, NO_OPTIONS);
	} // end encodeObject

	/**
	 * Serializes an object and returns the Base64-encoded version of that serialized object. If the object cannot be
	 * serialized or there is another error, the method will return <tt>null</tt>.
	 * <p>
	 * Valid options:
	 * 
	 * <pre>
	 *   GZIP: gzip-compresses object before encoding it.
	 *   DONT_BREAK_LINES: don't break lines at 76 characters
	 *     <i>Note: Technically, this makes your encoding non-compliant.</i>
	 * </pre>
	 * <p>
	 * Example: <code>encodeObject( myObj, Base64.GZIP )</code> or
	 * <p>
	 * Example: <code>encodeObject( myObj, Base64.GZIP | Base64.DONT_BREAK_LINES )</code>
	 * 
	 * @param serializableObject The object to encode
	 * @param options 
	 * @options Specified options
	 * @return The Base64-encoded object
	 * @see Base64#GZIP
	 * @see Base64#DONT_BREAK_LINES
	 * @since 2.0
	 */
	public static String encodeObject(java.io.Serializable serializableObject, int options)
	{
		// Streams
		java.io.ByteArrayOutputStream baos = null;
		java.io.OutputStream b64os = null;
		java.io.ObjectOutputStream oos = null;
		java.util.zip.GZIPOutputStream gzos = null;

		// Isolate options
		int gzip = options & GZIP;
		int dontBreakLines = options & DONT_BREAK_LINES;

		try
		{
			// ObjectOutputStream -> (GZIP) -> Base64 -> ByteArrayOutputStream
			baos = new java.io.ByteArrayOutputStream();
			b64os = new Base64.OutputStream(baos, ENCODE | dontBreakLines);

			// GZip?
			if(gzip == GZIP)
			{
				gzos = new java.util.zip.GZIPOutputStream(b64os);
				oos = new java.io.ObjectOutputStream(gzos);
			} // end if: gzip
			else
			{
				oos = new java.io.ObjectOutputStream(b64os);
			}

			oos.writeObject(serializableObject);
		} // end try
		catch(java.io.IOException e)
		{
			e.printStackTrace();
			return null;
		} // end catch
		finally
		{
			try
			{
				if (oos != null)
				{
					oos.close();
				}
			}
			catch(Exception e)
			{
				if(Config.ENABLE_ALL_EXCEPTIONS)
					e.printStackTrace();
			}
			try
			{
				if (gzos != null)
				{
					gzos.close();
				}
			}
			catch(Exception e)
			{
				if(Config.ENABLE_ALL_EXCEPTIONS)
					e.printStackTrace();
			}
			try
			{
				if (b64os != null)
				{
					b64os.close();
				}
			}
			catch(Exception e)
			{
				if(Config.ENABLE_ALL_EXCEPTIONS)
					e.printStackTrace();
			}
			try
			{
				if (baos != null)
				{
					baos.close();
				}
			}
			catch(Exception e)
			{
				if(Config.ENABLE_ALL_EXCEPTIONS)
					e.printStackTrace();
			}
		} // end finally

		// Return value according to relevant encoding.
		if (baos != null)
		{
			try
			{
				return new String(baos.toByteArray(), PREFERRED_ENCODING);
			} // end try
			catch(java.io.UnsupportedEncodingException uue)
			{
				if(Config.ENABLE_ALL_EXCEPTIONS)
					uue.printStackTrace();
				
				return new String(baos.toByteArray());
			} // end catch
		}
		return null;
	} // end encode

	/**
	 * Encodes a byte array into Base64 notation. Does not GZip-compress data.
	 * 
	 * @param source The data to convert
	 * @return 
	 * @since 1.4
	 */
	public static String encodeBytes(byte[] source)
	{
		return encodeBytes(source, 0, source.length, NO_OPTIONS);
	} // end encodeBytes

	/**
	 * Encodes a byte array into Base64 notation.
	 * <p>
	 * Valid options:
	 * 
	 * <pre>
	 *   GZIP: gzip-compresses object before encoding it.
	 *   DONT_BREAK_LINES: don't break lines at 76 characters
	 *     <i>Note: Technically, this makes your encoding non-compliant.</i>
	 * </pre>
	 * <p>
	 * Example: <code>encodeBytes( myData, Base64.GZIP )</code> or
	 * <p>
	 * Example: <code>encodeBytes( myData, Base64.GZIP | Base64.DONT_BREAK_LINES )</code>
	 * 
	 * @param source The data to convert
	 * @param options Specified options
	 * @return 
	 * @see Base64#GZIP
	 * @see Base64#DONT_BREAK_LINES
	 * @since 2.0
	 */
	public static String encodeBytes(byte[] source, int options)
	{
		return encodeBytes(source, 0, source.length, options);
	} // end encodeBytes

	/**
	 * Encodes a byte array into Base64 notation. Does not GZip-compress data.
	 * 
	 * @param source The data to convert
	 * @param off Offset in array where conversion should begin
	 * @param len Length of data to convert
	 * @return 
	 * @since 1.4
	 */
	public static String encodeBytes(byte[] source, int off, int len)
	{
		return encodeBytes(source, off, len, NO_OPTIONS);
	} // end encodeBytes

	/**
	 * Encodes a byte array into Base64 notation.
	 * <p>
	 * Valid options:
	 * 
	 * <pre>
	 *   GZIP: gzip-compresses object before encoding it.
	 *   DONT_BREAK_LINES: don't break lines at 76 characters
	 *     <i>Note: Technically, this makes your encoding non-compliant.</i>
	 * </pre>
	 * <p>
	 * Example: <code>encodeBytes( myData, Base64.GZIP )</code> or
	 * <p>
	 * Example: <code>encodeBytes( myData, Base64.GZIP | Base64.DONT_BREAK_LINES )</code>
	 * 
	 * @param source The data to convert
	 * @param off Offset in array where conversion should begin
	 * @param len Length of data to convert
	 * @param options Specified options
	 * @return 
	 * @see Base64#GZIP
	 * @see Base64#DONT_BREAK_LINES
	 * @since 2.0
	 */
	public static String encodeBytes(byte[] source, int off, int len, int options)
	{
		// Isolate options
		int dontBreakLines = options & DONT_BREAK_LINES;
		int gzip = options & GZIP;

		// Compress?
		if(gzip == GZIP)
		{
			java.io.ByteArrayOutputStream baos = null;
			java.util.zip.GZIPOutputStream gzos = null;
			Base64.OutputStream b64os = null;

			try
			{
				// GZip -> Base64 -> ByteArray
				baos = new java.io.ByteArrayOutputStream();
				b64os = new Base64.OutputStream(baos, ENCODE | dontBreakLines);
				gzos = new java.util.zip.GZIPOutputStream(b64os);

				gzos.write(source, off, len);
				gzos.close();
			} // end try
			catch(java.io.IOException e)
			{
				e.printStackTrace();
				return null;
			} // end catch
			finally
			{
				try
				{
					if (gzos != null)
					{
						gzos.close();
					}
				}
				catch(Exception e)
				{
					if(Config.ENABLE_ALL_EXCEPTIONS)
						e.printStackTrace();
				}
				try
				{
					if (b64os != null)
					{
						b64os.close();
					}
				}
				catch(Exception e)
				{
					if(Config.ENABLE_ALL_EXCEPTIONS)
						e.printStackTrace();
				}
				try
				{
					if (baos != null)
					{
						baos.close();
					}
				}
				catch(Exception e)
				{
					if(Config.ENABLE_ALL_EXCEPTIONS)
						e.printStackTrace();
				}
			} // end finally

			// Return value according to relevant encoding.
			if (baos != null)
			{
				try
				{
					return new String(baos.toByteArray(), PREFERRED_ENCODING);
				} // end try
				catch(java.io.UnsupportedEncodingException uue)
				{
					if(Config.ENABLE_ALL_EXCEPTIONS)
						uue.printStackTrace();
					
					return new String(baos.toByteArray());
				} // end catch
			}
			return null;
		} // end if: compress

		// Convert option to boolean in way that code likes it.
		boolean breakLines = dontBreakLines == 0;

		int len43 = len * 4 / 3;
		byte[] outBuff = new byte[len43 + (len % 3 > 0 ? 4 : 0) // Account for padding
				+ (breakLines ? len43 / MAX_LINE_LENGTH : 0)]; // New lines
		int d = 0;
		int e = 0;
		int len2 = len - 2;
		int lineLength = 0;
		for(; d < len2; d += 3, e += 4)
		{
			encode3to4(source, d + off, 3, outBuff, e);

			lineLength += 4;
			if(breakLines && lineLength == MAX_LINE_LENGTH)
			{
				outBuff[e + 4] = NEW_LINE;
				e++;
				lineLength = 0;
			} // end if: end of line
		} // en dfor: each piece of array

		if(d < len)
		{
			encode3to4(source, d + off, len - d, outBuff, e);
			e += 4;
		} // end if: some padding needed

		// Return value according to relevant encoding.
		try
		{
			return new String(outBuff, 0, e, PREFERRED_ENCODING);
		} // end try
		catch(java.io.UnsupportedEncodingException uue)
		{
			if(Config.ENABLE_ALL_EXCEPTIONS)
				uue.printStackTrace();
			return new String(outBuff, 0, e);
		} // end catch
		// end else: don't compress

	} // end encodeBytes

	/* ********  D E C O D I N G   M E T H O D S  ******** */

	//    /**
	//     * Decodes the first four bytes of array <var>fourBytes</var>
	//     * and returns an array up to three bytes long with the
	//     * decoded values.
	//     *
	//     * @param fourBytes the array with Base64 content
	//     * @return array with decoded values
	//     * @since 1.3
	//     */
	//    private static byte[] decode4to3( byte[] fourBytes )
	//    {
	//        byte[] outBuff1 = new byte[3];
	//        int    count    = decode4to3( fourBytes, 0, outBuff1, 0 );
	//        byte[] outBuff2 = new byte[ count ];
	//
	//        for( int i = 0; i < count; i++ )
	//            outBuff2[i] = outBuff1[i];
	//
	//        return outBuff2;
	//    }

	/**
	 * Decodes four bytes from array <var>source</var> and writes the resulting bytes (up to three of them) to
	 * <var>destination</var>. The source and destination arrays can be manipulated anywhere along their length by
	 * specifying <var>srcOffset</var> and <var>destOffset</var>. This method does not check to make sure your arrays
	 * are large enough to accomodate <var>srcOffset</var> + 4 for the <var>source</var> array or <var>destOffset</var>
	 * + 3 for the <var>destination</var> array. This method returns the actual number of bytes that were converted from
	 * the Base64 encoding.
	 * 
	 * @param source the array to convert
	 * @param srcOffset the index where conversion begins
	 * @param destination the array to hold the conversion
	 * @param destOffset the index where output will be put
	 * @return the number of decoded bytes converted
	 * @since 1.3
	 */
	static int decode4to3(byte[] source, int srcOffset, byte[] destination, int destOffset)
	{
		// Example: Dk==
		if(source[srcOffset + 2] == EQUALS_SIGN)
		{
			// Two ways to do the same thing. Don't know which way I like best.
			//int outBuff =   ( ( DECODABET[ source[ srcOffset    ] ] << 24 ) >>>  6 )
			//              | ( ( DECODABET[ source[ srcOffset + 1] ] << 24 ) >>> 12 );
			int outBuff = (DECODABET[source[srcOffset]] & 0xFF) << 18 | (DECODABET[source[srcOffset + 1]] & 0xFF) << 12;

			destination[destOffset] = (byte) (outBuff >>> 16);
			return 1;
		}

		// Example: DkL=
		else if(source[srcOffset + 3] == EQUALS_SIGN)
		{
			// Two ways to do the same thing. Don't know which way I like best.
			//int outBuff =   ( ( DECODABET[ source[ srcOffset     ] ] << 24 ) >>>  6 )
			//              | ( ( DECODABET[ source[ srcOffset + 1 ] ] << 24 ) >>> 12 )
			//              | ( ( DECODABET[ source[ srcOffset + 2 ] ] << 24 ) >>> 18 );
			int outBuff = (DECODABET[source[srcOffset]] & 0xFF) << 18 | (DECODABET[source[srcOffset + 1]] & 0xFF) << 12 | (DECODABET[source[srcOffset + 2]] & 0xFF) << 6;

			destination[destOffset] = (byte) (outBuff >>> 16);
			destination[destOffset + 1] = (byte) (outBuff >>> 8);
			return 2;
		}

		// Example: DkLE
		else
		{
			try
			{
				// Two ways to do the same thing. Don't know which way I like best.
				//int outBuff =   ( ( DECODABET[ source[ srcOffset     ] ] << 24 ) >>>  6 )
				//              | ( ( DECODABET[ source[ srcOffset + 1 ] ] << 24 ) >>> 12 )
				//              | ( ( DECODABET[ source[ srcOffset + 2 ] ] << 24 ) >>> 18 )
				//              | ( ( DECODABET[ source[ srcOffset + 3 ] ] << 24 ) >>> 24 );
				int outBuff = (DECODABET[source[srcOffset]] & 0xFF) << 18 | (DECODABET[source[srcOffset + 1]] & 0xFF) << 12 | (DECODABET[source[srcOffset + 2]] & 0xFF) << 6 | DECODABET[source[srcOffset + 3]] & 0xFF;

				destination[destOffset] = (byte) (outBuff >> 16);
				destination[destOffset + 1] = (byte) (outBuff >> 8);
				destination[destOffset + 2] = (byte) outBuff;

				return 3;
			}
			catch(Exception e)
			{
				if(Config.ENABLE_ALL_EXCEPTIONS)
					e.printStackTrace();
				
				System.out.println("" + source[srcOffset] + ": " + DECODABET[source[srcOffset]]);
				System.out.println("" + source[srcOffset + 1] + ": " + DECODABET[source[srcOffset + 1]]);
				System.out.println("" + source[srcOffset + 2] + ": " + DECODABET[source[srcOffset + 2]]);
				System.out.println("" + source[srcOffset + 3] + ": " + DECODABET[source[srcOffset + 3]]);
				return -1;
			} //e nd catch
		}
	} // end decodeToBytes

	/**
	 * Very low-level access to decoding ASCII characters in the form of a byte array. Does not support automatically
	 * gunzipping or any other "fancy" features.
	 * 
	 * @param source The Base64 encoded data
	 * @param off The offset of where to begin decoding
	 * @param len The length of characters to decode
	 * @return decoded data
	 * @since 1.3
	 */
	public static byte[] decode(byte[] source, int off, int len)
	{
		int len34 = len * 3 / 4;
		byte[] outBuff = new byte[len34]; // Upper limit on size of output
		int outBuffPosn = 0;

		byte[] b4 = new byte[4];
		int b4Posn = 0;
		int i = 0;
		byte sbiCrop = 0;
		byte sbiDecode = 0;
		for(i = off; i < off + len; i++)
		{
			sbiCrop = (byte) (source[i] & 0x7f); // Only the low seven bits
			sbiDecode = DECODABET[sbiCrop];

			if(sbiDecode >= WHITE_SPACE_ENC) // White space, Equals sign or better
			{
				if(sbiDecode >= EQUALS_SIGN_ENC)
				{
					b4[b4Posn++] = sbiCrop;
					if(b4Posn > 3)
					{
						outBuffPosn += decode4to3(b4, 0, outBuff, outBuffPosn);
						b4Posn = 0;

						// If that was the equals sign, break out of 'for' loop
						if(sbiCrop == EQUALS_SIGN)
						{
							break;
						}
					} // end if: quartet built

				} // end if: equals sign or better

			} // end if: white space, equals sign or better
			else
			{
				System.err.println("Bad Base64 input character at " + i + ": " + source[i] + "(decimal)");
				return null;
			} // end else:
		} // each input character

		byte[] out = new byte[outBuffPosn];
		System.arraycopy(outBuff, 0, out, 0, outBuffPosn);
		return out;
	} // end decode

	/**
	 * Decodes data from Base64 notation, automatically detecting gzip-compressed data and decompressing it.
	 * 
	 * @param s the string to decode
	 * @return the decoded data
	 * @since 1.4
	 */
	public static byte[] decode(String s)
	{
		byte[] bytes;
		try
		{
			bytes = s.getBytes(PREFERRED_ENCODING);
		} // end try
		catch(java.io.UnsupportedEncodingException uee)
		{
			if(Config.ENABLE_ALL_EXCEPTIONS)
				uee.printStackTrace();
			
			bytes = s.getBytes();
		} // end catch
		//</change>

		// Decode
		bytes = decode(bytes, 0, bytes.length);

		// Check to see if it's gzip-compressed
		// GZIP Magic Two-Byte Number: 0x8b1f (35615)
		if((bytes!= null) && (bytes.length >= 2))
		{

			int head = bytes[0] & 0xff | bytes[1] << 8 & 0xff00;
			if(bytes.length >= 4 && // Don't want to get ArrayIndexOutOfBounds exception
			java.util.zip.GZIPInputStream.GZIP_MAGIC == head)
			{
				java.io.ByteArrayInputStream bais = null;
				java.util.zip.GZIPInputStream gzis = null;
				java.io.ByteArrayOutputStream baos = null;
				byte[] buffer = new byte[2048];
				int length = 0;

				try
				{
					baos = new java.io.ByteArrayOutputStream();
					bais = new java.io.ByteArrayInputStream(bytes);
					gzis = new java.util.zip.GZIPInputStream(bais);

					while((length = gzis.read(buffer)) >= 0)
					{
						baos.write(buffer, 0, length);
					} // end while: reading input

					// No error? Get new bytes.
					bytes = baos.toByteArray();

				} // end try
				catch(java.io.IOException e)
				{
					// Just return originally-decoded bytes
					if(Config.ENABLE_ALL_EXCEPTIONS)
						e.printStackTrace();
				} // end catch
				finally
				{
					if(baos != null)
						try
						{
							baos.close();
						}
						catch(Exception e)
						{
							e.printStackTrace();
						}
					if(gzis != null)
						try
						{
							gzis.close();
						}
						catch(Exception e)
						{
							if(Config.ENABLE_ALL_EXCEPTIONS)
								e.printStackTrace();
						}
					if(bais != null)
						try
						{
							bais.close();
						}
						catch(Exception e)
						{
							if(Config.ENABLE_ALL_EXCEPTIONS)
								e.printStackTrace();
						}
				} // end finally

			} // end if: gzipped
		} // end if: bytes.length >= 2

		return bytes;
	} // end decode

	/**
	 * Attempts to decode Base64 data and deserialize a Java Object within. Returns <tt>null</tt> if there was an error.
	 * 
	 * @param encodedObject The Base64 data to decode
	 * @return The decoded and deserialized object
	 * @since 1.5
	 */
	public static Object decodeToObject(String encodedObject)
	{
		// Decode and gunzip if necessary
		byte[] objBytes = decode(encodedObject);

		java.io.ByteArrayInputStream bais = null;
		java.io.ObjectInputStream ois = null;
		Object obj = null;
		try
		{
			bais = new java.io.ByteArrayInputStream(objBytes);
			ois = new java.io.ObjectInputStream(bais);

			obj = ois.readObject();
		} // end try
		catch(java.io.IOException e)
		{
			e.printStackTrace();
		} // end catch
		catch(java.lang.ClassNotFoundException e)
		{
			e.printStackTrace();
		} // end catch
		finally
		{
			if(bais != null)
				try
				{
					bais.close();
				}
				catch(Exception e)
				{
					e.printStackTrace();
				}
			if(ois != null)
				try
				{
					ois.close();
				}
				catch(Exception e)
				{
					e.printStackTrace();
				}
		} // end finally

		return obj;
	} // end decodeObject

	/* ********  I N N E R   C L A S S   I N P U T S T R E A M  ******** */

	/**
	 * A {@link #InputStream} will read data from another {@link java.io.InputStream}, given in the constructor,
	 * and encode/decode to/from Base64 notation on the fly.
	 * 
	 * @see Base64
	 * @see java.io.FilterInputStream
	 * @since 1.3
	 */
	public static class InputStream extends java.io.FilterInputStream
	{
		//private int     options;        // Options specified
		private boolean encode; // Encoding or decoding
		private int position; // Current position in the buffer
		private byte[] buffer; // Small buffer holding converted data
		private int bufferLength; // Length of buffer (3 or 4)
		private int numSigBytes; // Number of meaningful bytes in the buffer
		private int lineLength;
		private boolean breakLines; // Break lines at less than 80 characters

		/**
		 * Constructs a {@link #InputStream} in DECODE mode.
		 * @param pIn the {@link java.io.InputStream} from which to read data.
		 * @since 1.3
		 */
		public InputStream(java.io.InputStream pIn)
		{
			this(pIn, DECODE);
		} // end constructor

		/**
		 * Constructs a {@link #InputStream} in either ENCODE or DECODE mode.
		 * <p>
		 * Valid options:
		 * 
		 * <pre>
		 *   ENCODE or DECODE: Encode or Decode as data is read.
		 *   DONT_BREAK_LINES: don't break lines at 76 characters
		 *     (only meaningful when encoding)
		 *     <i>Note: Technically, this makes your encoding non-compliant.</i>
		 * </pre>
		 * <p>
		 * Example: <code>new Base64.InputStream( in, Base64.DECODE )</code>
		 * 
		 * @param pIn the {@link java.io.InputStream} from which to read data.
		 * @param options Specified options
		 * @see Base64#ENCODE
		 * @see Base64#DECODE
		 * @see Base64#DONT_BREAK_LINES
		 * @since 2.0
		 */
		public InputStream(java.io.InputStream pIn, int options)
		{
			super(pIn);
			//this.options      = options;
			breakLines = (options & DONT_BREAK_LINES) != DONT_BREAK_LINES;
			encode = (options & ENCODE) == ENCODE;
			bufferLength = encode ? 4 : 3;
			buffer = new byte[bufferLength];
			position = -1;
			lineLength = 0;
		} // end constructor

		/**
		 * Reads enough of the input stream to convert to/from Base64 and returns the next byte.
		 * 
		 * @return next byte
		 * @since 1.3
		 */
		@Override
		public int read() throws java.io.IOException
		{
			// Do we need to get data?
			if(position < 0)
			{
				if(encode)
				{
					byte[] b3 = new byte[3];
					int numBinaryBytes = 0;
					for(int i = 0; i < 3; i++)
					{
						try
						{
							int b = in.read();

							// If end of stream, b is -1.
							if(b >= 0)
							{
								b3[i] = (byte) b;
								numBinaryBytes++;
							} // end if: not end of stream

						} // end try: read
						catch(java.io.IOException e)
						{
							if(Config.ENABLE_ALL_EXCEPTIONS)
								e.printStackTrace();
							
							// Only a problem if we got no data at all.
							if(i == 0)
								throw e;

						} // end catch
					} // end for: each needed input byte

					if(numBinaryBytes > 0)
					{
						encode3to4(b3, 0, numBinaryBytes, buffer, 0);
						position = 0;
						numSigBytes = 4;
					} // end if: got data
					else
						return -1;
				} // end if: encoding

				// Else decoding
				else
				{
					byte[] b4 = new byte[4];
					int i = 0;
					for(i = 0; i < 4; i++)
					{
						// Read four "meaningful" bytes:
						int b = 0;
						do
						{
							b = in.read();
						} while(b >= 0 && DECODABET[b & 0x7f] <= WHITE_SPACE_ENC);

						if(b < 0)
						{
							break; // Reads a -1 if end of stream
						}

						b4[i] = (byte) b;
					} // end for: each needed input byte

					if(i == 4)
					{
						numSigBytes = decode4to3(b4, 0, buffer, 0);
						position = 0;
					} // end if: got four characters
					else if(i == 0)
						return -1;
					else
						// Must have broken out from above.
						throw new java.io.IOException("Improperly padded Base64 input.");

				} // end else: decode
			} // end else: get data

			// Got data?
			if(position >= 0)
			{
				// End of relevant data?
				if( /*!encode &&*/position >= numSigBytes)
					return -1;

				if(encode && breakLines && lineLength >= MAX_LINE_LENGTH)
				{
					lineLength = 0;
					return '\n';
				} // end if
				lineLength++; // This isn't important when decoding
				// but throwing an extra "if" seems
				// just as wasteful.

				int b = buffer[position++];

				if(position >= bufferLength)
				{
					position = -1;
				}

				return b & 0xFF; // This is how you "cast" a byte that's
				// intended to be unsigned.
				// end else
			} // end if: position >= 0

			// When JDK1.4 is more accepted, use an assertion here.
			throw new java.io.IOException("Error in Base64 code reading stream.");
			// end else
		} // end read

		/**
		 * Calls {@link #read} repeatedly until the end of stream is reached or <var>len</var> bytes are read. Returns
		 * number of bytes read into array or -1 if end of stream is encountered.
		 * 
		 * @param dest array to hold values
		 * @param off offset for array
		 * @param len max number of bytes to read into array
		 * @return bytes read into array or -1 if end of stream is encountered.
		 * @since 1.3
		 */
		@Override
		public int read(byte[] dest, int off, int len) throws java.io.IOException
		{
			int i;
			int b;
			for(i = 0; i < len; i++)
			{
				b = read();

				//if( b < 0 && i == 0 )
				//    return -1;

				if(b >= 0)
				{
					dest[off + i] = (byte) b;
				}
				else if(i == 0)
					return -1;
				else
				{
					break; // Out of 'for' loop
				}
			} // end for: each byte read
			return i;
		} // end read

	} // end inner class InputStream

	/* ********  I N N E R   C L A S S   O U T P U T S T R E A M  ******** */

	/**
	 * A {@link #OutputStream} will write data to another {@link java.io.OutputStream}, given in the constructor,
	 * and encode/decode to/from Base64 notation on the fly.
	 * 
	 * @see Base64
	 * @see java.io.FilterOutputStream
	 * @since 1.3
	 */
	public static class OutputStream extends java.io.FilterOutputStream
	{
		//private int     options;
		private boolean encode;
		private int position;
		private byte[] buffer;
		private int bufferLength;
		private int lineLength;
		private boolean breakLines;
		private byte[] b4; // Scratch used in a few places
		private boolean suspendEncoding;

		/**
		 * Constructs a {@link #OutputStream} in ENCODE mode.
		 * 
		 * @param pOut the {@link java.io.OutputStream} to which data will be written.
		 * @since 1.3
		 */
		public OutputStream(java.io.OutputStream pOut)
		{
			this(pOut, ENCODE);
		} // end constructor

		/**
		 * Constructs a {@link #OutputStream} in either ENCODE or DECODE mode.
		 * <p>
		 * Valid options:
		 * 
		 * <pre>
		 *   ENCODE or DECODE: Encode or Decode as data is read.
		 *   DONT_BREAK_LINES: don't break lines at 76 characters
		 *     (only meaningful when encoding)
		 *     <i>Note: Technically, this makes your encoding non-compliant.</i>
		 * </pre>
		 * <p>
		 * Example: <code>new Base64.OutputStream( out, Base64.ENCODE )</code>
		 * 
		 * @param pOut the {@link java.io.OutputStream} to which data will be written.
		 * @param options Specified options.
		 * @see Base64#ENCODE
		 * @see Base64#DECODE
		 * @see Base64#DONT_BREAK_LINES
		 * @since 1.3
		 */
		public OutputStream(java.io.OutputStream pOut, int options)
		{
			super(pOut);
			//this.options      = options;
			breakLines = (options & DONT_BREAK_LINES) != DONT_BREAK_LINES;
			encode = (options & ENCODE) == ENCODE;
			bufferLength = encode ? 3 : 4;
			buffer = new byte[bufferLength];
			position = 0;
			lineLength = 0;
			suspendEncoding = false;
			b4 = new byte[4];
		} // end constructor

		/**
		 * Writes the byte to the output stream after converting to/from Base64 notation. When encoding, bytes are
		 * buffered three at a time before the output stream actually gets a write() call. When decoding, bytes are
		 * buffered four at a time.
		 * 
		 * @param theByte the byte to write
		 * @since 1.3
		 */
		@Override
		public void write(int theByte) throws java.io.IOException
		{
			// Encoding suspended?
			if(suspendEncoding)
			{
				super.out.write(theByte);
				return;
			} // end if: supsended

			// Encode?
			if(encode)
			{
				buffer[position++] = (byte) theByte;
				if(position >= bufferLength) // Enough to encode.
				{
					out.write(encode3to4(b4, buffer, bufferLength));

					lineLength += 4;
					if(breakLines && lineLength >= MAX_LINE_LENGTH)
					{
						out.write(NEW_LINE);
						lineLength = 0;
					} // end if: end of line

					position = 0;
				} // end if: enough to output
			} // end if: encoding

			// Else, Decoding
			else
			{
				// Meaningful Base64 character?
				if(DECODABET[theByte & 0x7f] > WHITE_SPACE_ENC)
				{
					buffer[position++] = (byte) theByte;
					if(position >= bufferLength) // Enough to output.
					{
						int len = Base64.decode4to3(buffer, 0, b4, 0);
						out.write(b4, 0, len);
						//out.write( Base64.decode4to3( buffer ) );
						position = 0;
					} // end if: enough to output
				} // end if: meaningful base64 character
				else if(DECODABET[theByte & 0x7f] != WHITE_SPACE_ENC)
					throw new java.io.IOException("Invalid character in Base64 data.");
			} // end else: decoding
		} // end write

		/**
		 * Calls {@link #write} repeatedly until <var>len</var> bytes are written.
		 * 
		 * @param theBytes array from which to read bytes
		 * @param off offset for array
		 * @param len max number of bytes to read into array
		 * @since 1.3
		 */
		@Override
		public void write(byte[] theBytes, int off, int len) throws java.io.IOException
		{
			// Encoding suspended?
			if(suspendEncoding)
			{
				super.out.write(theBytes, off, len);
				return;
			} // end if: supsended

			for(int i = 0; i < len; i++)
			{
				write(theBytes[off + i]);
			} // end for: each byte written

		} // end write

		/**
		 * Method added by PHIL. [Thanks, PHIL. -Rob] This pads the buffer without closing the stream.
		 * @throws java.io.IOException 
		 */
		public void flushBase64() throws java.io.IOException
		{
			if(position > 0)
			{
				if(encode)
				{
					out.write(encode3to4(b4, buffer, position));
					position = 0;
				} // end if: encoding
				else
					throw new java.io.IOException("Base64 input not properly padded.");
			} // end if: buffer partially full

		} // end flush

		/**
		 * Flushes and closes (I think, in the superclass) the stream.
		 * 
		 * @since 1.3
		 */
		@Override
		public void close() throws java.io.IOException
		{
			// 1. Ensure that pending characters are written
			flushBase64();

			// 2. Actually close the stream
			// Base class both flushes and closes.
			super.close();

			buffer = null;
			out = null;
		} // end close

		/**
		 * Suspends encoding of the stream. May be helpful if you need to embed a piece of base640-encoded data in a
		 * stream.
		 * @throws java.io.IOException 
		 * 
		 * @since 1.5.1
		 */
		public void suspendEncoding() throws java.io.IOException
		{
			flushBase64();
			suspendEncoding = true;
		} // end suspendEncoding

		/**
		 * Resumes encoding of the stream. May be helpful if you need to embed a piece of base640-encoded data in a
		 * stream.
		 * 
		 * @since 1.5.1
		 */
		public void resumeEncoding()
		{
			suspendEncoding = false;
		} // end resumeEncoding

	} // end inner class OutputStream

} // end class Base64
